Use the form below to do your conversion.
Solution
Step1
Log13991=Log(991) ÷ Log(13)
Log(991)= 2.9960736544853
Log(13)=1.1139433523068
Log13991=2.9960736544853 ÷ 1.1139433523068
Ans=2.6896104261323
Step2
Alternatively, the logarithm can be calculated like this.